stm32f0: usart: set up array of consoles

source/drivers/usart_console.c

@@ -23,7 +23,7 @@ struct usart_console {
 	uint32_t dev;
 };
 
-struct usart_console *usart1 = NULL;
+static struct usart_console *usart[4];
 struct usart_console user_console;
 
 static void usart_isr(struct usart_console *console)
@@ -42,17 +42,23 @@ static void usart_isr(struct usart_console *console)
 		if (next != console->cur)
 			console->next = next;
 
-		switch (console->recv_buf[idx]) {
-		case '\003': scb_reset_system();
-		case '\r': console->process_line();
-		default: break;
+		if (console->recv_buf[idx] == '\003')
+			scb_reset_system();
+
+		if (console->recv_buf[idx] == '\r' && console->process_line) {
+			console->process_line();
 		}
 	}
 }
 
 void usart1_isr(void)
 {
-	usart_isr(usart1);
+	usart_isr(usart[0]);
+}
+
+void usart2_isr(void)
+{
+	usart_isr(usart[1]);
 }
 
 static char usart_getc(struct usart_console *console, int block)
@@ -180,7 +186,7 @@ void console_init(void)
 	user_console.dev = USART1;
 	user_console.cur = 0;
 	user_console.next = 0;
-	usart1 = &user_console;
+	usart[0] = &user_console;
 	usart_init(&user_console);
 
 	stdin = fopencookie(&user_console, "r", console_in);